Technicolor leptoquarks and the excess of NC and CC events with high-$Q^2$ at HERA

Abstract

In this paper we pursue a consistent leptoquark interpretation for HERA anomalies in the framework of Technicolor. We find that: (a) one F=0 scalar Technicolor leptoquark $P_3^{{}^{\prime }}$ with a mass of 200 GeV can provide the required contributions to account for the excess of both neutral and charged current events with high-$Q^2$ at HERA; (b) the current data still allow the coexistence of $P_3^{{}^{\prime }}$ with m(P_3^{'})= 200 GeV$and$P_3^0$with$m(P_3^0)=225 GeV$,theycouldcontributeeffectivelyto$e^+p$collisionprocessandmayberesponsiblefortheapparentsplittingofaveragemassofH1andZEUSNCeventswithhigh-$Q^2$.

Comments: 26 pages, Latex, no macros, two PS figures and 1 embedded latex figure